It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer (LDV).Most rotating machinery parts do not only rotate, they are often subjected to additional excitations. These excitations can lead to minor performance and more wear and finally to the destruction of these components. Hence, it is of interest to have appropriate information about deformations and deviations caused by external excitations. Examples for these effects are processes with cut off wheels grinding wheels, once they are interconnected with different materials, turbine blades under heavy loads of air or fluid as well as brake discs or bearings under operational conditions. In all these applications, analyses of the dynamic behaviour of rotary machine parts are desirable. This can be described by the length and direction of the displacement vector of any material fixed point during its run time.This displacement vector, caused by the external excitations, can be split into two components. Namely into in-plane displacements which take place inside the rotational plane. They are mainly caused by the fluctuating rotational speed, which is always present. Secondly, out-of-plane displacements take place into direction of the rotational axes, mainly caused by lateral loads (Fig. 1).To measure the deformation and vibration of the rotating objects, the displacement vector of any material fixed point between the relaxed position and the position of the same point under load should be determined. This vector can be defined and split relative to body fixed frame, dependent on the measurement methods (Fig. 2).There are several methods to measure the out-of-plane displacement, like holographic interferometry and laser Fig.

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Problem of ball bearing and roller bearing noise generation is important in present technology level, and its solution stands in front for a new machine designer. New materials of bearings create new problems of bearing noise generation, so research of noise and vibration generation mechanism in necessary. Problem of lubrication gives significant influence to vibration and noise generation in bearings, so in common task of bearing work vibration is quite complex and requires experimental verification of theoretical ideas. This paper is intended to cover noise generation mechanism of ceramic bearings in comparison to steel ones and evaluate influence of bearing lubricant with different properties. There are presented design of experimental workbenches, experimental research procedure and results from research. Experimental results material is presented graphically and numerically. Finally, conclusion on problem and results of experimental research are made.